Android: Contacts+ is one of the most useful address books we've seen. It combines photos with information from all your connected services: Google and Google+, Facebook, Twitter, LinkedIn, and more. One tap opens a contact card, another calls or emails a friend, and a few more catches you up with their digital lives.

Your contacts are all shown with their portrait photo next to them (synced from Google+ or Facebook), and you can toggle groups and favorites so you only see the people that matter to you. Contacts+ features an integrated dialer, so you can browse and call right from within the app. The app will even merge duplicate contacts to keep everything organized. In addition to the services above, the app supports geolocation via Foursquare and text messages through WhatsApp. You can tap on any of the icons on the left side of the screen to see your friends' latest updates on any connected service.

Contacts+ also has a home screen widget for quick browsing and calling, displays your contacts in a photo grid or a traditional list, features light and dark themes you can switch between, and even alerts you to your friends' birthdays so you remember to give them a call or send them a message.

Since our favorite address book for Android was acquired by Yahoo (and is subsequently no longer available to download), Contacts+ is a more than welcome alternative. The app works just as well on Android tablets as it does on phones, and has an optimized tablet version for large screens. Best of all, the app is totally free. Hit the link below to give it a try.